Area Code 6043 – Medellín

Geographic Overview

The area code 6043 is a geographic National Destination Code (NDC) assigned to the city of Medellín, the capital of the department of Antioquia in Colombia. Medellín is the second-largest city in the country and a major economic and industrial hub. The code 6043 is part of the broader 604 numbering plan area, which covers the Aburrá Valley and surrounding municipalities. Specifically, the 6043 prefix is allocated to fixed-line telephone services within Medellín's metropolitan area, including neighborhoods such as El Poblado, Laureles, and downtown Medellín.

Dialing Formats

When calling a Medellín fixed-line number from within Colombia, you must dial the national trunk prefix 0, followed by the area code 604, and then the subscriber number. For numbers beginning with 6043, the complete national format is: 0 604 3XX XXXX. From abroad, you dial the international access code (e.g., 00 from most countries), then Colombia's country code 57, followed by the area code without the leading zero and the subscriber number: +57 604 3XX XXXX. Note that the area code 604 is not optional; it must always be dialed, even for local calls within Medellín, as per Colombian numbering regulations.

Caller Instructions

For local callers within Medellín, dialing a 6043 number requires the full national format: 0 604 3XX XXXX. For international callers, always use the plus sign (+) or the appropriate international prefix, followed by 57 and the number: +57 604 3XX XXXX. Ensure you omit the leading zero of the area code when dialing from abroad.

Numbering and Overlays

Colombia uses a closed numbering plan for fixed lines, meaning the subscriber number length is fixed at eight digits. The 6043 prefix is part of the 604 area, which has not been overlaid with additional area codes; however, the 604 area covers a large metropolitan region, and the 6043 prefix specifically identifies a subset of lines within Medellín. As of recent years, number portability is available for fixed lines, allowing users to retain their 6043 number when switching service providers, but the geographic significance remains tied to the original location.

Regulatory Notes

The Comisión de Regulación de Comunicaciones (CRC) oversees numbering assignments in Colombia. The 6043 prefix is classified as a geographic number, and its use is restricted to fixed-line services. VoIP services may also use geographic numbers, but they must comply with location-based routing requirements. For accurate billing and emergency services, it is essential that the number's geographic association is maintained.